2. It can eliminate muscle tension, strengthen the strength and flexibility of core muscles, and achieve the balance of exercise. It is an indispensable instrument in modern yoga practice. Foam shaft can not only stretch muscles and tendons, but also decompose soft tissue adhesion and scar tissue. You can use your own weight and a cylindrical foam shaft to massage yourself and release myofascia, break the trigger point, relieve the tense fascia, and increase blood flow and soft tissue circulation.